A girl while walking diametrically across a semicircular playground, takes 3 minutes less than if she had kept walking round the circular path from A to B. If she walks 60 metres a minute, what is diameter of the play ground?

• ক 315 m E. None of these ✅ সঠিক উত্তর
• খ 48 m
• গ 60 m
• ঘ If she walks 60 metres a minute, what is diameter of the play ground?